Sink



FIG. 1 is a perspective view taken from the top, front and right side of a sink showing our new design;

FIG. 2 is a top plan view of the sink shown in FIG. 1;

FIG. 3 is a bottom view of the sink shown in FIG. 1;

FIG. 4 is a front side view of the sink shown in FIG. 1;

FIG. 5 is a rear side view of the sink shown in FIG. 1;

FIG. 6 is a left side view of the sink shown in FIG. 1; and,

FIG. 7 is a right side view of the sink shown in FIG. 1.

The broken lines disclosing an opening for a faucet are for illustration purposes only and form no part of the claimed design. 

The ornamental design for a sink, as shown and described. 